Separation of U (VI) ions from the aqueous phase onto polyphenol silica nanocomposite in the batch adsorption system

The chemical modified silica nanoparticles with a polyphenol compound were synthesized as a sorbent nanocomposite for U (VI) removal from the aqueous phase. The prepared Pyrogallol silica nanocomposite (PSCN) was described by some specific analysis. The experiments were carried out in a batch system. The maximum sorption capacity of the nanocomposite reached 58.45 mg/g at optimum operating conditions (sorption time 50 min, pH 5, dose 0.2 g, 100 mg/l of U (VI) and 30 degrees C). The sorption procedure was an exothermic system and the results were in good agreement with pseudo-second-order (R-2 > 99) and Langmuir isotherm (R-2 > 97). Regeneration and recycling studies indicate that the prepared nanocomposite has good effectiveness for up to five cycles. (C) 2021 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).